I had chosen the phone I wanted as an upgrade on my O2 contract and was quoted a price that was much higher than expected and included a down payment as well. I conducted a search for a better deal and found this with e2save - no down payment and £6.50 a month cheaper despite still using the O2 network. I wasn't certain that I could purchase my phone through them as an upgrade on my existing contract, keeping the same number, so I called them and it was explained that I could and my order was processed straight away. It was simple and efficient and the phone arrived the next day as promised. Delighted with the service and cost saving so would definitely recommend.